/*
 * Copyright (c) 2021, Uppsala universitet.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "contiki.h"
#include "unit-test.h"
#include "lib/sha-256.h"
#include "lib/hexconv.h"
#include <stddef.h>
#include <string.h>
#include <stdio.h>

PROCESS(test_process, "test");
AUTOSTART_PROCESSES(&test_process);

static const struct {
  const char *data[3];
  uint8_t hash[SHA_256_DIGEST_LENGTH];
} hashes[] = {
  { /* Simple */
    {
      "abc",
      NULL,
      NULL
    }, {
      0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea,
      0x41, 0x41, 0x40, 0xde, 0x5d, 0xae, 0x22, 0x23,
      0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,
      0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad
    }
  }, { /* Simple */
    {
      "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
      NULL,
      NULL,
    }, {
      0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8,
      0xe5, 0xc0, 0x26, 0x93, 0x0c, 0x3e, 0x60, 0x39,
      0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67,
      0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1
    }
  }, { /* Message of length 130 */
    {
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklabcd"
      "efghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmn",
      NULL,
      NULL
    }, {
      0x15, 0xd2, 0x3e, 0xea, 0x57, 0xb3, 0xd4, 0x61,
      0xbf, 0x38, 0x91, 0x12, 0xab, 0x4c, 0x43, 0xce,
      0x85, 0xe1, 0x68, 0x23, 0x8a, 0xaa, 0x54, 0x8e,
      0xc8, 0x6f, 0x0c, 0x9d, 0x65, 0xf9, 0xb9, 0x23
    }
  }, { /* Message of length 128 */
    {
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklabcd"
      "efghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl",
      NULL,
      NULL
    }, {
      0xf8, 0xa3, 0xf2, 0x26, 0xfc, 0x42, 0x10, 0xe9,
      0x0d, 0x13, 0x0c, 0x7f, 0x41, 0xf2, 0xbe, 0x66,
      0x45, 0x53, 0x85, 0xd2, 0x92, 0x0a, 0xda, 0x78,
      0x15, 0xf8, 0xf7, 0x95, 0xd9, 0x44, 0x90, 0x5f
    }
  }, { /* Message of length 64 */
    {
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl",
      NULL,
      NULL
    }, {
      0x2f, 0xcd, 0x5a, 0x0d, 0x60, 0xe4, 0xc9, 0x41,
      0x38, 0x1f, 0xcc, 0x4e, 0x00, 0xa4, 0xbf, 0x8b,
      0xe4, 0x22, 0xc3, 0xdd, 0xfa, 0xfb, 0x93, 0xc8,
      0x09, 0xe8, 0xd1, 0xe2, 0xbf, 0xff, 0xae, 0x8e
    }
  }, { /* Message of length 66 */
    {
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmn",
      NULL,
      NULL
    }, {
      0x92, 0x90, 0x1c, 0x85, 0x82, 0xe3, 0x1c, 0x05,
      0x69, 0xb5, 0x36, 0x26, 0x9c, 0xe2, 0x2c, 0xc8,
      0x30, 0x8b, 0xa4, 0x17, 0xab, 0x36, 0xc1, 0xbb,
      0xaf, 0x08, 0x4f, 0xf5, 0x8b, 0x18, 0xdc, 0x6a
    }
  }, {
    {
      "abcdbcdecdefde",
      "fgefghfghighijhijkijkljklmklmnlmnomnopnopq",
      NULL
    }, {
      0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8,
      0xe5, 0xc0, 0x26, 0x93, 0x0c, 0x3e, 0x60, 0x39,
      0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67,
      0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1
    }
  }, {
    {
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl",
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl",
      NULL
    }, {
      0xf8, 0xa3, 0xf2, 0x26, 0xfc, 0x42, 0x10, 0xe9,
      0x0d, 0x13, 0x0c, 0x7f, 0x41, 0xf2, 0xbe, 0x66,
      0x45, 0x53, 0x85, 0xd2, 0x92, 0x0a, 0xda, 0x78,
      0x15, 0xf8, 0xf7, 0x95, 0xd9, 0x44, 0x90, 0x5f
    }
  }, {
    {
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefgh",
      "ijkl",
      "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl"
    }, {
      0xf8, 0xa3, 0xf2, 0x26, 0xfc, 0x42, 0x10, 0xe9,
      0x0d, 0x13, 0x0c, 0x7f, 0x41, 0xf2, 0xbe, 0x66,
      0x45, 0x53, 0x85, 0xd2, 0x92, 0x0a, 0xda, 0x78,
      0x15, 0xf8, 0xf7, 0x95, 0xd9, 0x44, 0x90, 0x5f
    }
  }, { /* empty string */
    {
      "",
      NULL,
      NULL
    }, {
      0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
      0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
      0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
      0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
    }
  }
};
static const struct {
  uint8_t key[SHA_256_BLOCK_SIZE];
  uint8_t keylen;
  uint8_t data[SHA_256_BLOCK_SIZE];
  uint32_t datalen;
  uint8_t hmac[SHA_256_DIGEST_LENGTH];
} hmacs[] = {
  {
    {
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b ,
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b ,
      0x0b , 0x0b , 0x0b , 0x0b
    },
    20,
    {
      0x48 , 0x69 , 0x20 , 0x54 , 0x68 , 0x65 , 0x72 , 0x65
    },
    8,
    {
      0xb0 , 0x34 , 0x4c , 0x61 , 0xd8 , 0xdb , 0x38 , 0x53 ,
      0x5c , 0xa8 , 0xaf , 0xce , 0xaf , 0x0b , 0xf1 , 0x2b ,
      0x88 , 0x1d , 0xc2 , 0x00 , 0xc9 , 0x83 , 0x3d , 0xa7 ,
      0x26 , 0xe9 , 0x37 , 0x6c , 0x2e , 0x32 , 0xcf , 0xf7
    }
  }
};
static const struct {
  uint8_t salt[128];
  uint32_t salt_len;
  uint8_t ikm[128];
  uint32_t ikm_len;
  uint8_t info[128];
  uint32_t info_len;
  uint8_t prk[SHA_256_DIGEST_LENGTH];
  uint8_t okm[128];
  uint16_t okm_len;
} keys[] = {
  {
    {
      0x00 , 0x01 , 0x02 , 0x03 , 0x04 , 0x05 , 0x06 , 0x07 ,
      0x08 , 0x09 , 0x0a , 0x0b , 0x0c
    },
    13,
    {
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b ,
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b ,
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b
    },
    22,
    {
      0xf0 , 0xf1 , 0xf2 , 0xf3 , 0xf4 , 0xf5 , 0xf6 , 0xf7 ,
      0xf8 , 0xf9
    },
    10,
    {
      0x07 , 0x77 , 0x09 , 0x36 , 0x2c , 0x2e , 0x32 , 0xdf ,
      0x0d , 0xdc , 0x3f , 0x0d , 0xc4 , 0x7b , 0xba , 0x63 ,
      0x90 , 0xb6 , 0xc7 , 0x3b , 0xb5 , 0x0f , 0x9c , 0x31 ,
      0x22 , 0xec , 0x84 , 0x4a , 0xd7 , 0xc2 , 0xb3 , 0xe5
    },
    {
      0x3c , 0xb2 , 0x5f , 0x25 , 0xfa , 0xac , 0xd5 , 0x7a ,
      0x90 , 0x43 , 0x4f , 0x64 , 0xd0 , 0x36 , 0x2f , 0x2a ,
      0x2d , 0x2d , 0x0a , 0x90 , 0xcf , 0x1a , 0x5a , 0x4c ,
      0x5d , 0xb0 , 0x2d , 0x56 , 0xec , 0xc4 , 0xc5 , 0xbf ,
      0x34 , 0x00 , 0x72 , 0x08 , 0xd5 , 0xb8 , 0x87 , 0x18 ,
      0x58 , 0x65
    },
    42
  },
  {
    {
      0x60 , 0x61 , 0x62 , 0x63 , 0x64 , 0x65 , 0x66 , 0x67 ,
      0x68 , 0x69 , 0x6a , 0x6b , 0x6c , 0x6d , 0x6e , 0x6f ,
      0x70 , 0x71 , 0x72 , 0x73 , 0x74 , 0x75 , 0x76 , 0x77 ,
      0x78 , 0x79 , 0x7a , 0x7b , 0x7c , 0x7d , 0x7e , 0x7f ,
      0x80 , 0x81 , 0x82 , 0x83 , 0x84 , 0x85 , 0x86 , 0x87 ,
      0x88 , 0x89 , 0x8a , 0x8b , 0x8c , 0x8d , 0x8e , 0x8f ,
      0x90 , 0x91 , 0x92 , 0x93 , 0x94 , 0x95 , 0x96 , 0x97 ,
      0x98 , 0x99 , 0x9a , 0x9b , 0x9c , 0x9d , 0x9e , 0x9f ,
      0xa0 , 0xa1 , 0xa2 , 0xa3 , 0xa4 , 0xa5 , 0xa6 , 0xa7 ,
      0xa8 , 0xa9 , 0xaa , 0xab , 0xac , 0xad , 0xae , 0xaf
    },
    80,
    {
      0x00 , 0x01 , 0x02 , 0x03 , 0x04 , 0x05 , 0x06 , 0x07 ,
      0x08 , 0x09 , 0x0a , 0x0b , 0x0c , 0x0d , 0x0e , 0x0f ,
      0x10 , 0x11 , 0x12 , 0x13 , 0x14 , 0x15 , 0x16 , 0x17 ,
      0x18 , 0x19 , 0x1a , 0x1b , 0x1c , 0x1d , 0x1e , 0x1f ,
      0x20 , 0x21 , 0x22 , 0x23 , 0x24 , 0x25 , 0x26 , 0x27 ,
      0x28 , 0x29 , 0x2a , 0x2b , 0x2c , 0x2d , 0x2e , 0x2f ,
      0x30 , 0x31 , 0x32 , 0x33 , 0x34 , 0x35 , 0x36 , 0x37 ,
      0x38 , 0x39 , 0x3a , 0x3b , 0x3c , 0x3d , 0x3e , 0x3f ,
      0x40 , 0x41 , 0x42 , 0x43 , 0x44 , 0x45 , 0x46 , 0x47 ,
      0x48 , 0x49 , 0x4a , 0x4b , 0x4c , 0x4d , 0x4e , 0x4f
    },
    80,
    {
      0xb0 , 0xb1 , 0xb2 , 0xb3 , 0xb4 , 0xb5 , 0xb6 , 0xb7 ,
      0xb8 , 0xb9 , 0xba , 0xbb , 0xbc , 0xbd , 0xbe , 0xbf ,
      0xc0 , 0xc1 , 0xc2 , 0xc3 , 0xc4 , 0xc5 , 0xc6 , 0xc7 ,
      0xc8 , 0xc9 , 0xca , 0xcb , 0xcc , 0xcd , 0xce , 0xcf ,
      0xd0 , 0xd1 , 0xd2 , 0xd3 , 0xd4 , 0xd5 , 0xd6 , 0xd7 ,
      0xd8 , 0xd9 , 0xda , 0xdb , 0xdc , 0xdd , 0xde , 0xdf ,
      0xe0 , 0xe1 , 0xe2 , 0xe3 , 0xe4 , 0xe5 , 0xe6 , 0xe7 ,
      0xe8 , 0xe9 , 0xea , 0xeb , 0xec , 0xed , 0xee , 0xef ,
      0xf0 , 0xf1 , 0xf2 , 0xf3 , 0xf4 , 0xf5 , 0xf6 , 0xf7 ,
      0xf8 , 0xf9 , 0xfa , 0xfb , 0xfc , 0xfd , 0xfe , 0xff
    },
    80,
    {
      0x06 , 0xa6 , 0xb8 , 0x8c , 0x58 , 0x53 , 0x36 , 0x1a ,
      0x06 , 0x10 , 0x4c , 0x9c , 0xeb , 0x35 , 0xb4 , 0x5c ,
      0xef , 0x76 , 0x00 , 0x14 , 0x90 , 0x46 , 0x71 , 0x01 ,
      0x4a , 0x19 , 0x3f , 0x40 , 0xc1 , 0x5f , 0xc2 , 0x44
    },
    {
      0xb1 , 0x1e , 0x39 , 0x8d , 0xc8 , 0x03 , 0x27 , 0xa1 ,
      0xc8 , 0xe7 , 0xf7 , 0x8c , 0x59 , 0x6a , 0x49 , 0x34 ,
      0x4f , 0x01 , 0x2e , 0xda , 0x2d , 0x4e , 0xfa , 0xd8 ,
      0xa0 , 0x50 , 0xcc , 0x4c , 0x19 , 0xaf , 0xa9 , 0x7c ,
      0x59 , 0x04 , 0x5a , 0x99 , 0xca , 0xc7 , 0x82 , 0x72 ,
      0x71 , 0xcb , 0x41 , 0xc6 , 0x5e , 0x59 , 0x0e , 0x09 ,
      0xda , 0x32 , 0x75 , 0x60 , 0x0c , 0x2f , 0x09 , 0xb8 ,
      0x36 , 0x77 , 0x93 , 0xa9 , 0xac , 0xa3 , 0xdb , 0x71 ,
      0xcc , 0x30 , 0xc5 , 0x81 , 0x79 , 0xec , 0x3e , 0x87 ,
      0xc1 , 0x4c , 0x01 , 0xd5 , 0xc1 , 0xf3 , 0x43 , 0x4f ,
      0x1d , 0x87
    },
    82
  },
  {
    {},
    0,
    {
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b ,
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b ,
      0x0b , 0x0b , 0x0b , 0x0b , 0x0b , 0x0b
    },
    22,
    {},
    0,
    {
      0x19 , 0xef , 0x24 , 0xa3 , 0x2c , 0x71 , 0x7b , 0x16 ,
      0x7f , 0x33 , 0xa9 , 0x1d , 0x6f , 0x64 , 0x8b , 0xdf ,
      0x96 , 0x59 , 0x67 , 0x76 , 0xaf , 0xdb , 0x63 , 0x77 ,
      0xac , 0x43 , 0x4c , 0x1c , 0x29 , 0x3c , 0xcb , 0x04
    },
    {
      0x8d , 0xa4 , 0xe7 , 0x75 , 0xa5 , 0x63 , 0xc1 , 0x8f ,
      0x71 , 0x5f , 0x80 , 0x2a , 0x06 , 0x3c , 0x5a , 0x31 ,
      0xb8 , 0xa1 , 0x1f , 0x5c , 0x5e , 0xe1 , 0x87 , 0x9e ,
      0xc3 , 0x45 , 0x4e , 0x5f , 0x3c , 0x73 , 0x8d , 0x2d ,
      0x9d , 0x20 , 0x13 , 0x95 , 0xfa , 0xa4 , 0xb6 , 0x1a ,
      0x96 , 0xc8
    },
    42
  }
};

/*---------------------------------------------------------------------------*/
UNIT_TEST_REGISTER(sha_256_hash_stepwise, "SHA-256 stepwise hashing");
UNIT_TEST(sha_256_hash_stepwise)
{
  UNIT_TEST_BEGIN();

  for(size_t i = 0; i < sizeof(hashes) / sizeof(hashes[0]); i++) {
    SHA_256.init();
    for(size_t j = 0;
        j < sizeof(hashes[i].data) / sizeof(hashes[i].data[0]);
        j++) {
      if(!hashes[i].data[j]) {
        continue;
      }
      SHA_256.update((const uint8_t *)hashes[i].data[j],
          strlen(hashes[i].data[j]));
    }
    uint8_t digest[SHA_256_DIGEST_LENGTH];
    SHA_256.finalize(digest);
    UNIT_TEST_ASSERT(!memcmp(digest, hashes[i].hash, sizeof(digest)));
  }

  UNIT_TEST_END();
}
/*---------------------------------------------------------------------------*/
UNIT_TEST_REGISTER(sha_256_hash_with_checkpoint, "SHA-256 with checkpoint");
UNIT_TEST(sha_256_hash_with_checkpoint)
{
  UNIT_TEST_BEGIN();

  for(size_t i = 0; i < sizeof(hashes) / sizeof(hashes[0]); i++) {
    SHA_256.init();
    sha_256_checkpoint_t checkpoint;
    SHA_256.create_checkpoint(&checkpoint);
    for(size_t j = 0;
        j < sizeof(hashes[i].data) / sizeof(hashes[i].data[0]);
        j++) {
      SHA_256.restore_checkpoint(&checkpoint);
      if(!hashes[i].data[j]) {
        continue;
      }
      SHA_256.update((const uint8_t *)hashes[i].data[j],
          strlen(hashes[i].data[j]));
      SHA_256.create_checkpoint(&checkpoint);
    }
    uint8_t sha256[SHA_256_DIGEST_LENGTH];
    SHA_256.finalize(sha256);
    UNIT_TEST_ASSERT(!memcmp(sha256, hashes[i].hash, sizeof(sha256)));
  }

  UNIT_TEST_END();
}
/*---------------------------------------------------------------------------*/
UNIT_TEST_REGISTER(sha_256_hash_shorthand, "SHA-256 hash shorthand");
UNIT_TEST(sha_256_hash_shorthand)
{
  UNIT_TEST_BEGIN();

  for(size_t i = 0; i < sizeof(hashes) / sizeof(hashes[0]); i++) {
    uint8_t buf[256];
    size_t buf_len = 0;
    for(size_t j = 0;
        j < sizeof(hashes[i].data) / sizeof(hashes[i].data[0]);
        j++) {
      if(!hashes[i].data[j]) {
        continue;
      }
      memcpy(buf + buf_len, hashes[i].data[j], strlen(hashes[i].data[j]));
      buf_len += strlen(hashes[i].data[j]);
    }
    uint8_t digest[SHA_256_DIGEST_LENGTH];
    SHA_256.hash(buf, buf_len, digest);
    UNIT_TEST_ASSERT(!memcmp(digest, hashes[i].hash, sizeof(digest)));
  }

  UNIT_TEST_END();
}
/*---------------------------------------------------------------------------*/
UNIT_TEST_REGISTER(sha_256_hmac, "SHA-256 HMAC");
UNIT_TEST(sha_256_hmac)
{
  UNIT_TEST_BEGIN();

  for(size_t i = 0; i < sizeof(hmacs) / sizeof(hmacs[0]); i++) {
    uint8_t hmac[SHA_256_DIGEST_LENGTH];
    sha_256_hmac((uint8_t *)hmacs[i].key, hmacs[i].keylen,
        hmacs[i].data, hmacs[i].datalen,
        hmac);
    UNIT_TEST_ASSERT(!memcmp(hmac, hmacs[i].hmac, sizeof(hmac)));
  }

  UNIT_TEST_END();
}
/*---------------------------------------------------------------------------*/
UNIT_TEST_REGISTER(sha_256_hkdf, "SHA-256 HKDF");
UNIT_TEST(sha_256_hkdf)
{
  UNIT_TEST_BEGIN();

  for(size_t i = 0; i < sizeof(keys) / sizeof(keys[0]); i++) {
    uint8_t prk[SHA_256_DIGEST_LENGTH];
    sha_256_hkdf_extract(keys[i].salt, keys[i].salt_len,
        keys[i].ikm, keys[i].ikm_len,
        prk);
    UNIT_TEST_ASSERT(!memcmp(prk, keys[i].prk, sizeof(prk)));
    uint8_t okm[128];
    sha_256_hkdf_expand(prk, sizeof(prk),
        keys[i].info, keys[i].info_len,
        okm, keys[i].okm_len);
    UNIT_TEST_ASSERT(!memcmp(okm, keys[i].okm, keys[i].okm_len));
  }

  UNIT_TEST_END();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(test_process, ev, data)
{
  PROCESS_BEGIN();

  printf("Run unit-test\n");
  printf("---\n");

  UNIT_TEST_RUN(sha_256_hash_stepwise);
  UNIT_TEST_RUN(sha_256_hash_with_checkpoint);
  UNIT_TEST_RUN(sha_256_hash_shorthand);
  UNIT_TEST_RUN(sha_256_hmac);
  UNIT_TEST_RUN(sha_256_hkdf);

  if(!UNIT_TEST_PASSED(sha_256_hash_stepwise)
      || !UNIT_TEST_PASSED(sha_256_hash_with_checkpoint)
      || !UNIT_TEST_PASSED(sha_256_hash_shorthand)
      || !UNIT_TEST_PASSED(sha_256_hmac)
      || !UNIT_TEST_PASSED(sha_256_hkdf)) {
    printf("=check-me= FAILED\n");
    printf("---\n");
  }

  printf("=check-me= DONE\n");
  printf("---\n");

  PROCESS_END();
}
/*---------------------------------------------------------------------------*/
